Casio CTK-573 Service Manual

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3) Equipment connection/Procedure
Vop voltage setting
Watching the LCD at a 36.1° angle to the horizontal, adjust Vop
voltage so that unenergized segments are seen dimly.
ADJUSTMENT
DISPLAY PCB
1) Items to be adjusted:
2) Adjustment and Test Point Locations
(TOP VIEW)
Input
Connection
Input
Point
Input
Signal
Adjust
Output
Connection
Output
Point
Adjust for
VR401
Voltmeter TP1-TP2
Adjust for 4.3 ~ 4.4 V reading
on voltmeter under the tem-
perature 20 ~ 25 °C.
Make fine adjustment accord-
ing to the next instruction.
Output
Set Voltmeter
TP1
TP2
36.1°
LCD
Eye
Item Measuring Instrument
Vop voltage setting Voltmeter
TP1 (LSI401 Pin33)
TP2 (LSI401 Pin30)

Casio CTK-573 Specifications

General

Brand	Casio
Model	CTK-573
Category	Electronic Keyboard
Language	English